diff options
| author | Max Gurtovoy <mgurtovoy@nvidia.com> | 2021-08-26 13:39:08 +0300 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2021-08-26 19:36:51 +0300 |
| commit | 343b7258687ecfbb363bfda8833a7cf641aac524 (patch) | |
| tree | 434e78584525876789777812c37e572de60dd563 /drivers/pci/pci-driver.c | |
| parent | c61302aa48f7c46b5c9d893109488af951be12e4 (diff) | |
| download | linux-343b7258687ecfbb363bfda8833a7cf641aac524.tar.xz | |
PCI: Add 'override_only' field to struct pci_device_id
Add 'override_only' field to struct pci_device_id to be used as part of
pci_match_device().
When set, a driver only matches the entry when dev->driver_override is
set to that driver.
In addition, add a helper macro named 'PCI_DEVICE_DRIVER_OVERRIDE' to
enable setting some data on it.
Next patch from this series will use the above functionality.
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20210826103912.128972-10-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/pci/pci-driver.c')
| -rw-r--r-- | drivers/pci/pci-driver.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 3a72352aa5cf..123c590ebe1d 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -136,7 +136,7 @@ static const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_dev *dev) { struct pci_dynid *dynid; - const struct pci_device_id *found_id = NULL; + const struct pci_device_id *found_id = NULL, *ids; /* When driver_override is set, only bind to the matching driver */ if (dev->driver_override && strcmp(dev->driver_override, drv->name)) @@ -152,14 +152,28 @@ static const struct pci_device_id *pci_match_device(struct pci_driver *drv, } spin_unlock(&drv->dynids.lock); - if (!found_id) - found_id = pci_match_id(drv->id_table, dev); + if (found_id) + return found_id; - /* driver_override will always match, send a dummy id */ - if (!found_id && dev->driver_override) - found_id = &pci_device_id_any; + for (ids = drv->id_table; (found_id = pci_match_id(ids, dev)); + ids = found_id + 1) { + /* + * The match table is split based on driver_override. + * In case override_only was set, enforce driver_override + * matching. + */ + if (found_id->override_only) { + if (dev->driver_override) + return found_id; + } else { + return found_id; + } + } - return found_id; + /* driver_override will always match, send a dummy id */ + if (dev->driver_override) + return &pci_device_id_any; + return NULL; } /** |